<script setup lang="ts">
import type { UploadChangeParam } from 'ant-design-vue'
import { delOss, listByIds } from '@/api/system/oss'
import { propTypes } from '@/utils/propTypes'
import { globalHeaders } from '@/utils/request'
import type { OssVO } from '~/api/system/oss/types.ts'

const props = defineProps({
  modelValue: [String, Object, Array],
  // 数量限制
  limit: propTypes.number.def(5),
  // 大小限制(MB)
  fileSize: propTypes.number.def(10),
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: propTypes.array.def(['doc', 'xls', 'ppt', 'txt', 'pdf', 'png', 'jpg', 'jpeg']),
  // 是否显示提示
  isShowTip: propTypes.bool.def(true),
  isShowList: propTypes.bool.def(false),
})

const emit = defineEmits(['update:modelValue', 'success'])

const message = useMessage()
const loading = ref<boolean>(false)
const AntLoading = useLoading({ text: '正在上传文件，请稍候...' })

const number = ref(0)
const uploadList = ref<any[]>([])

const baseUrl = import.meta.env.VITE_APP_BASE_API
const uploadFileUrl = ref(`${baseUrl}/resource/oss/upload`) // 上传文件服务器地址
const headers = ref(globalHeaders())

const fileList = ref<any[]>([])
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize),
)

watch(() => props.modelValue, async (val) => {
  if (val) {
    // 首先将值转为数组
    let list: OssVO[] = []
    if (Array.isArray(val)) {
      list = val as OssVO[]
    }
    else {
      const res = await listByIds(val as string)
      list = res.data
    }
    // 然后将数组转为对象数组
    // eslint-disable-next-line style/multiline-ternary
    fileList.value = list ? list.map((item) => {
      // 字符串回显处理 如果此处存的是url可直接回显 如果存的是id需要调用接口查出来
      let itemData
      if (typeof item === 'string') {
        itemData = { name: item, url: item }
      }
      else {
        // 此处name使用ossId 防止删除出现重名
        itemData = { name: item.ossId, url: item.url, ossId: item.ossId }
      }
      return itemData
    }) : []
  }
  else {
    fileList.value = []
    return []
  }
}, { deep: true, immediate: true })

// 上传前校检格式和大小
function handleBeforeUpload(file: any) {
  // 校检文件类型
  if (props.fileType.length) {
    const fileName = file.name.split('.')
    const fileExt = fileName[fileName.length - 1]
    const isTypeOk = props.fileType.includes(fileExt)
    if (!isTypeOk) {
      message.error(`文件格式不正确, 请上传${props.fileType.join('/')}格式文件!`)
      return false
    }
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize
    if (!isLt) {
      message.error(`上传文件大小不能超过 ${props.fileSize} MB!`)
      return false
    }
  }
  console.log('number======', number.value)
  console.log('limit======', props.limit)
  console.log('fileList======', fileList.value.length)
  if (props.limit > 1) {
    if (fileList.value.length >= props.limit) {
      message.error(`上传文件数量不能超过 ${props.limit} 个!`)
      return false
    }
  }

  AntLoading.open()
  number.value++
  console.log('number======', number.value)
  return true
}

// 上传成功回调
function handleUploadSuccess(info: UploadChangeParam) {
  console.log(info)
  if (info.file.status === 'uploading') {
    loading.value = true
    return
  }
  if (info.file.status === 'done') {
    // Get this url from response in real world.
    console.log(info)
    const res = info.file.response
    console.log(res)
    if (res.code === 200) {
      uploadList.value.push({ name: res.data.fileName, url: res.data.url, ossId: res.data.ossId })
      uploadedSuccessfully()
    }
    else {
      number.value--
      AntLoading.close()
      message.error(res.msg)
      uploadedSuccessfully()
    }
    AntLoading.close()
  }
  if (info.file.status === 'error') {
    message.error('文件上传失败')
    AntLoading.close()
  }
}

// 删除文件
function handleDelete(index: number) {
  const ossId = fileList.value[index].ossId
  delOss(ossId)
  fileList.value.splice(index, 1)
  emit('update:modelValue', listToString(fileList.value))
}

// 上传结束处理
function uploadedSuccessfully() {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value)
    uploadList.value = []
    number.value = 0
    emit('update:modelValue', listToString(fileList.value))
    emit('success', fileList.value)
    AntLoading.close()
  }
}

// 获取文件名称
function getFileName(name: string) {
  // 如果是url那么取最后的名字 如果不是直接返回
  if (name.lastIndexOf('/') > -1)
    return name.slice(name.lastIndexOf('/') + 1)
  else
    return name
}

// 对象转成指定字符串分隔
function listToString(list: any[], separator?: string) {
  let strs = ''
  separator = separator || ','
  list.forEach((item) => {
    if (item.ossId)
      strs += item.ossId + separator
  })
  return strs !== '' ? strs.substring(0, strs.length - 1) : ''
}

defineExpose({ handleDelete })
</script>

<template>
  <div class="upload-file">
    <a-upload
      v-model:file-list="fileList"
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :max-count="limit"
      :show-upload-list="false"
      :headers="headers"
      class="upload-file-uploader"
      @remove="handleDelete"
      @change="handleUploadSuccess"
    >
      <slot>
        <!-- 上传按钮 -->
        <a-button type="primary">
          选取文件
        </a-button>
      </slot>
    </a-upload>
    <!-- 上传提示 -->
    <div v-if="showTip" class="el-upload__tip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>
    <!-- 文件列表 -->
    <template v-if="isShowList">
      <li v-for="(file, index) in fileList" :key="file.uid" class="el-upload-list__item ele-upload-list__item-content">
        <a-button type="link" :href="`${file.url}`" :underline="false" target="_blank">
          <span class="el-icon-document"> {{ getFileName(file.name) }} </span>
        </a-button>
        <div class="ele-upload-list__item-content-action">
          <a-button type="link" :underline="false" @click="handleDelete(index)">
            删除
          </a-button>
        </div>
      </li>
    </template>
  </div>
</template>

<style scoped lang="less">
.upload-file-uploader {
    margin-bottom: 5px;
}

.upload-file-list .el-upload-list__item {
    border: 1px solid #e4e7ed;
    line-height: 2;
    margin-bottom: 10px;
    position: relative;
}

.upload-file-list .ele-upload-list__item-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: inherit;
}

.ele-upload-list__item-content-action .el-link {
    margin-right: 10px;
    padding-left:10px;
}
</style>
